SAP2014 - List of Authors (Tang, J.Y.)

Paper	Title	Page
WEPH04	Physics Design of CSNS RCS Injection and Extraction System	32
	J. Qiu, N. Huang, J.Y. Tang, S. Wang IHEP, Beijing, People's Republic of China
	In this paper, the development of injection and extraction system design for CSNS RCS are introduced. It is a challenge for the injection system to place all the complicated injection devices in one uninterrupted long drift, such as DC and painting bumper magnets, the carbon stripping foils system, beam monitors, the ceramic vacuum chambers, and beam dump. The beam extraction process from the CSNS RCS is a single turn two step process, requiring a group of kickers and a Lambertson septum magnet.

WEPH20	Mismatch Study of C-ADS Main Linac	65
	C. Meng, S. Pei, J.Y. Tang, F. Yan IHEP, Beijing, People's Republic of China
	The C-ADS accelerator is a CW (Continuous-Wave) proton linac of 1.5 GeV in beam energy, 10 mA in beam current, and 15 MW in beam power. To meet the extremely low beam loss rate and high reliability, it is very important to study the beam halo caused by beam mismatch. To avoid the envelope instability, the phase advances per period are smaller than 90 degree in the design of main linac. In this paper, we reported the results of emittance growth and the envelope oscillations caused by mismatch in the main linac section. According to the simulation results, the transverse mismatch factor should be smaller than 0.4 and longitudinal mismatch factor smaller than 0.3 to meet the emittance growth requirement.

Paper

Title

Page

Physics Design of CSNS RCS Injection and Extraction System

32

J. Qiu, N. Huang, J.Y. Tang, S. Wang
IHEP, Beijing, People's Republic of China

In this paper, the development of injection and extraction system design for CSNS RCS are introduced. It is a challenge for the injection system to place all the complicated injection devices in one uninterrupted long drift, such as DC and painting bumper magnets, the carbon stripping foils system, beam monitors, the ceramic vacuum chambers, and beam dump. The beam extraction process from the CSNS RCS is a single turn two step process, requiring a group of kickers and a Lambertson septum magnet.

WEPH20

Mismatch Study of C-ADS Main Linac

65

C. Meng, S. Pei, J.Y. Tang, F. Yan
IHEP, Beijing, People's Republic of China

The C-ADS accelerator is a CW (Continuous-Wave) proton linac of 1.5 GeV in beam energy, 10 mA in beam current, and 15 MW in beam power. To meet the extremely low beam loss rate and high reliability, it is very important to study the beam halo caused by beam mismatch. To avoid the envelope instability, the phase advances per period are smaller than 90 degree in the design of main linac. In this paper, we reported the results of emittance growth and the envelope oscillations caused by mismatch in the main linac section. According to the simulation results, the transverse mismatch factor should be smaller than 0.4 and longitudinal mismatch factor smaller than 0.3 to meet the emittance growth requirement.